Bumping min OCP version

[benjaminjb]

Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change, as applicable?
• Have you tested your changes on all related environments with successful results, as applicable?
  • Have you added automated tests?

Type of Changes:

• New feature
• Bug fix
• Documentation
• Testing enhancement
• Other

What is the current behavior (link to any open issues here)?

The operator works on 4.8, but due to the extract command used there, we cannot install on 4.8 using OperatorHub. (The bundle ends up being too big and 4.8 doesn't offer the gzip option that 4.9 does.)

What is the new behavior (if this is a feature change)?

• Breaking change (fix or feature that would cause existing functionality to change)

Update min in docs

Other Information: